// gcc tempGood.c -o tempGood -lwiringPi
#include<stdio.h>
#include<wiringPi.h>


int main(){
 wiringPiSetup() ;
 pinMode (15, OUTPUT) ;   // 右边下面第四个
 while(1){
     digitalWrite(15,HIGH);
     delay(2000);
     digitalWrite(15,LOW);
     delay(2000);
 }
}